Cbr600 conversion route

Hi vf boys, Ive been concentrating on other things for a couple of years now so the VF just sat there under a cover, It took a while starting as it was full of old fuel that needed purging,but it now throbs once again.
My question is to BIF the holder of all things wise with the vf.
I am now in a position to start my cbr wheel conversion once again, I am looking at the sprockets
and see in an older post you said to remove 10mm from the sprocket mounting face on the carrier, my question is… Do I remove 10mm from the cbr sprocket mount face or the vf mount face then use the bushes you mentioned.
Also when you say mounting face do you mean the bolt holes need to be machined back so the sprocket is further into the centre or is it the outer edge of the carrier hub, sorry for sounding stupid but its been a while.

Thanks
Nigel